set terminal postscript eps 20
set output 'groupme-evolution-tagging.eps'

set xdata time 
set timefmt "%Y-%m-%d" 
set format x "%b %d"
set xrange ["2007-07-10":"2007-12-20"]
set yrange [0:3.2]
set xlabel 'date' font "Arial,26"
set ylabel 'average number of tag assignments' font "Arial,26"

show terminal
plot 'evolution-avg-number-of-tag-assignments-per-resource.txt' 	using 1:2 with lines lw 3 lt 1  	title "tag assignments per resource" , \
	'evolution-avg-number-of-tag-assignments-per-group.txt' 	using  1:2 with lines lw 3 lt 2		title "tag assignments per group"